Knitting-machine.



W. F. RLSTN.

KNVI'TING MACHNE AJPLIUATION HLM) Ama. uw

1,090,1l 1 9l Patented Mar. m, um

2 SHEETS'SHEET 1 ROLSTON. KNI'HING Mmmm).

APPLXCATION HLED AUFLIL M12 Patented Mar. 10, 1914` LOJ H9..

L da aia YMAJL chine.

UNITED STATES WALTER F. ROLSTON, OF

TURING COMPANY, 0F

PATENT oEEiaoE.

KNIT'rINd-MACHINE.

Specification of Letters Patent.

Patented Mar. 101914.

Application filed August 2, 1912. Serial 110,712.92

To all rwlw m it may concer-n Be it known that I, WALTER F. RoLs'roN, a

citizen of the Rockford, in the county of i rinnebago and the State new and vuseful Improvements in Knitting- Machines, of which the following is va specication.

The object of this invention is to construct aA device that shall automatically stop the Working'of a knitting machine if the feed of the yarn is broken or in any way hindered in its passage from the bobbins to the needles.

In the accompanying drawing: Figure 1 is a side ele "ation of the yarn feeding mechanism of a knit-ting machine. Fig. 2 is a section on the line o a of Fig. 5, showing the tripping mechanism in its normal position. Fig. 3 is a similar section on the linea a. of Fig. fashowing the tripping mechanism having been set off. Fig. 4 is afront View of the feedingr mechanism of a knitting` nia- Fig. showing` the location of the members that setoff the tripping mechanism.

In the drawings onlyso much of a, knitting machine. is shown as is sufficient' to eX- plain my invention.

The machine has a bed 1, a horizontal re: ciprocatiimr yarn a driving shaft 4 driven by the pulley 5, also carrying the loose pulley 6, and a belt shifter 7 pivoted at 8, all of which are Well known factors in the construction of knitting machines. Suitably supported on the bed 1 of themachine is the vertical rod or post 9, A'Which forms themain support for the .feeding apparatus. Clamped to the post Si' is the bracket 10, which hasforined at its extremity two oblique jaws 1l and 12, riveted together carrying a. plurality of horizontal wires 13, which are held parallel by the auxiliary jaws 14 and 15, also riveted together.

sleeve bracket 16 is The adjustable clamped to the post. 9 above the bracket 10, and carries in its sleeve a horizontal rod 17.

which lies parallel to the tension Wires 13.

lMounted on the rod 17, and carried rigidly y a slt-screw, is the collar 18, having the extending support 19, on which at its upper extremity is rigidly carried .the bolt 20, upon which is pivotally mounted the arm 21, having connection with a spiral spring coiled United States. residing at;

of Illinois, have invented certain 5 is a fragmentary plan view carrier 2, a yarn changer Si.

' body I about the bolt 20. and the other end fastened thereto, 'the tension of the spring forcing the irm 1n a contra-clockwise direction, said arm carrying a Awire spring 22, one end of which is held in the arm 21 andthe other end having an eye or loop, through Which'is suspended a spring tension Wire 23, one end of which is rigidly secured-to the arm 21 and the other carrying an eye or loop. The holt 2l is fastened rigidly, intermedia-te the bolt 20 and the rod 17, to the support 19, and carries a spring tension Wire coiled thereabout, one end carrying-an eye orloop. the other end extending up, forming a nar,-l row V portion 26, the lower end of which has a spring connection 27 with the oollarl8, thisI spring `holcing the tension Wire and its portion 26 in a normal position. l

"lhe collar fastened rigidly to the rod 1T by a set-screw, carries a vertical rod 29, bein; r lient just below the collar 28 to a horizonfal posit ion. and .supports at its extremity a rod l). which lies horizontalvand parallel to the rod 1T. and carries a. yarn feed stop IH. Iivotally supported bqv the collar 28, but on the side opposite to the rod 29, is the rod 31, which .ies at a angle parallel to the jaws 11 and l2, and carries a plurality of eyes' 32. spaced intermediate the tension Wires lil; also to he same pivotal support is secured the upstauding olfset rodl 33.

@lumped to the post 9 above the bracket- U3, the tripping mechanism` the object of in v invention.

The main bod)` portion 35 has pivoted t o it a catch member 36 having two oppositely extending arms, which have two straight parallel sides 3T and and two similarly curved sides Sli? and l0. Bearing up `against the member 3G, just a little to one side. of the pivot and at the beginning of the curve 10, is the rod -l-l. having one end beveled and the other end pivotallv connected to the belt shifter T. and which is guided by the slot 42 formed in the frame 55, and which is also held to oml end of the slot, as shown in Fig. 2. by the spring 13, which is fastened to the The. horizontal rod 4.11 is pivotally connected at one end to the boov 35, and has its movable end held up against the vertical stationary bar #415. secured to the member 28, said rod '-14 being held Ithus by the bell-crank lever 46, having a Weight atA its free end. Pivoted to the body 35, is the dog 47, which is adapted to engage in notches formed in the member 36,

The tripping mechanism is shown in its normal positie-n in Fig. 2, the rod 41 bearing` 5 up against the member 3G, which is held from revolving by the rod 44, which rests under the outer extremitv of the face 36, the dog 47 simply resting inoperative as shown.

Thepassage of the yarn through the feeding apparatus is as follows: The yarn 43 comes from the spool or bobbin, passes over the wires 13 and through the eyes 32 as shown, thus forming a tension for the yarn;

from here the yarn passes through 15 supported by the spring tension -wire 25, the `passes through the feed stop up through the eye formed by the tension wire 23, and 'tillen down to the yarn carrier'2 which feeds the arn to the needles.

Te action of the feeding. apparatus is as follows; The knitting machine is driven by lany suitable power by the shaft 4, and the yarn carrier 2 holding the yarn 49, a portion 'of the yarn 48, is reciprocated across the needles, feeding out yarn, and thus drawing the spring tension wire 23 down.

Because of the design in the shape of the stockings, le'ss yarn is required at some reciprocations than at othersa' p ortion of thc yarn 1s unused. which slacltis 'taken up by the spring tension wire 23. `=When the yarn carrier returns, and more yarn is fed out, the spring tension wire 23 will again be drawn down, the yarn being stop 34, allowing additional yarn to be drawn through the eye carried by the spring tension wire 25, eyes 32, tension wires 13 and from the bobbin. As' additional yarn is being drawn, the spring tensionfyvire 23 will 40 rise by the strength of the springs 22 and 23, and the spiral spring fastened to the arm 20, thus pulling the yarn 50, aportin of the yarn 48, above the yarn stop 34, which will then automatically stop the feed of the yarn.

The operation of the tripping mechanism to stop the machine will be geen from the following: Should the yarn' the course of its passage between the bobbins and the feed stop 34, be broken, the Y'tail end of the yarn would either pass through the tension eyes 32, or; cause theyarn to become so slack,-that the bar 31 would fall to a vertical position, thereby swinging its upper bar 33 into contact with the horizontal rod 44. This contact will swing the rod 44 pn its pivot, and thereby it will be disengaged from beneath the surface 37 of the member 36. Sincethe member 36 is now free, the so rod 41 will" be raised by the cylindrical weight 53 at the end of the belt shifter 7, shifting the belt to the loose pulley 6, there-4 stopping the working of the machine.

Tlhe member 36 willjthen assume a vertical as posltifgn, with the r'd 41 held up close to the eyeV freed from the it by the spring 43, as shown in 3. ll'hen the break in the yarn has beccarepnired, the rod41 is brought-down as s'l'qwn in dotted lines in Fig. 3, the'spring 43ffgrcf,

ingsr it to the end of the slot 42; the-dofgg holding the member l u movement, The Vbeveled end of the irod 41A 3G from any backward will then bear upward'l against thecurvd surface 39, andwset. the membeif36 in vits normal set pesition, with the-end of. the" straight surface 38 resting on the horizontal rod 44. which is moved in again by the weight on the bell-crank lever 46. If the feed of the yarn should bestopped'in any way, the yarn already' in the feeding apparatus would be gradually consumed bythe. needles, drawing the spring tensionwire V25 down untihits upstanding portionv 26 was swung into Contact with the .rod 44, and-thus the tripping mechanism set off'and the machine stopped. If the yarn should be broken at a point between the feed stop34 and the yarn carrier 2, the spring tension wire23 would fly up and strike the rod 44, thus setting off thetripping mechanism and stop ing the machine.

lVl'iilein the above description l have described the feeding mechanism of `the yarn 48 only, it will be understood that aplurality of feeding apparatus can be carried on the rod 17 and adapted to set offk the tripping mechanism in the manner l have described, and I have shown a second such apparatus carrying the yarn .'31, whose portion 52 leads to the yarn changer When the design in ,knitting requires a different yarn, the yarn 5,2 will be automatically substituted for the yarn 49, the yaiii 52 being then held in the yarn carrier 2. l

In the construction of tripping devices now in use, the pressure of a rod similar to that of rod 41 against different members, has always, because of the design of such members, been too great for the blow that the members 26 and 33 give on being released to set of the tripping mechanism even though the weight on the beltJ shifter be reduced to a minimum, and this causes the machine to continue vrunning when a break occurs, which results in the loss of the stocking being knitted; but it will be readily seen that in the novel construction already described.

and especially of the bearing point of the.

rod 41, that the mechanism will be tripped instantly upon the least side thrust on the rod 44. f I claim as my invention: f 1. A knitting machine stopping device, comprisinga drive stop, a pivoted catch, a rod having a thrust against said catch mein- Vber at one side of the pivot thereofa trip-.V

ping bar adapted to contact said catch at the opposite side of its pivot and to heidi the catch in a set position against the actioii of .said rod, and means for releasing said tripf by disengagin contact with t e catch causing the rod tok ping bar, whereby the catch is released theresaid rod from its thrust actuate the stopping device l 2. A knittin machine stopping device, comprising a drive stop, a pivoted catch member, a rod having athrust against said catch member and a connection with the drive stop, a tripping bar adaptedv to hold the catch in a set position against the action of said rodl` means for releasing the tripping har whereby the catch is sprung and the rod actuated to operate the stopping device, and means for maintaining the catch in its sprung position to allow said rod to he operated independently7 of thecatch t0 set therod in its said thrust position when the tripping bar,has been returned to its normalpositionaaI f p f 3. A, lmitting 1 nachine[stopping 4device, comprising@ drive stop, a pivotedcatch, a vertical.; rod having anv `upward ,thrust against the catch and having a connection with thev drive stop, a pivoted horizontal i tripping bar adapted to release the catch.,

means 'foi'ipivoting the tripping bar thereby allowing the catch to vpivot and the vertical rod to riseand exigera-te thedrive stop, and a dog adapted to'hpld .the c'atcl from backward movement. r Y., A

4. A knittingJ machine stopping device, comprising drive stop, a pivoted catch having twooppositely extendingarms, a vertical rod having an upwardthrust against one of the dams, to one side of the pivot and having connection with the drive stop, a pivoted tripping bar adapted to restunder the othcrfarm of the catch and hold the catch from movement,means for pivoting.

holding the catch in a set position, means for vpivoting the tripping bar, thereby releasing the catch and allowin the vertical rod to rise and operate the drive stop, a dog adapted to hold the catch from backward movement, a spring adapted to hold the vertical rod against the catch so that upon the downward movement of the vertical rod, said rod will set the catch in a set position.

6. In a knitting machine stopping device, a pivoted catch, a member having a thrust contact with the catch at one side of the pivot thereof and bein connected witha drive stop, means actual yarn feed and Aheilig adapted to hold said catch in a set position, said catch when released by said member, being pivoted to allow the. thrust member to move separate from the catch and cause operation ofthe drive stop, and said catch having a face operable upon by the thrust member when said member has been retracted from said operated movement and again engages the catch in a thrust Contact, to move the catch to its set position.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. v

. VALTER ROLSTON.

Witnesses:

A. O. BEHE'I., JOHN F. MCCANN, Jr.

e by defect in the. 

